Coating machine



Jan. .1, 193 5.

R. J. HUTT ET AL COATING MACHINE 'ori inal Filed March 24, 1933.

2 sheets sheet 1 Rober i'lh wii TTORNEY Patented Jan. 1, 1 935 NITED-STATES PATENT OFFICE Robert J. min 2:213? mmouyn, N. Y.

Original application March 24, 1933, Serial N0.

, 662,492. Divided and this application September 26, 1933, Serial No.690,998

4 Claims.

This invention relates to improved coating mechanismfor applying pastelines to a paper web or the like, which is drawn or fed along or -over asupporting frame and is particularly adaptable to packaging machinessuch as shown and described in an application filed by us March 24,1933,"Ser. No. 662,492 and of which this forms a divisional application.

An object of this coating mechanism is to provide means for applyingmarginal lines of paste to a preferablyintermittently moving web ofpaper, in this case a base web, on which the individual contents ofpackages may beplaced, prior to receiving a printed transparent webthereon, said webs being subsequently sealed over the contents and cutinto desired size packages simultaneously with the operation ofmechanism for feeding said webs the distance of a dimen sion of one ofsaid packages which operation is repeated over and over again to eject acomplete package from the packaging machine at a the end of each feedingmovement of said webs and contents.

Another object of the invention is to provide means for applyingtransverse or cross lines of adhesive to said paper web at each dwell inthe intermittent feeding movement, said cross lines preferably extendingfrom one marginal paste line to the other to form appropriate barespaces employed.

suitable for depositing the contents of packages to be completed byco-operating mechanisms forming no part of the present invention laterset forth in a general description. In the drawings: I Fig. 1 is a sideelevation, with parts omitted, of a packaging machine of the type shcwnand described in the tified.

Fig. 1a. is a atic perspective of part of a paper web showing lines ofadhesive .as applied by our invention.

of' the paste applying mechanism of the inven-' tion and detached fromthe packaging machine, the line of section being about on the line 22 ofFig. 3.

Fig. 3 is a plan view of the said paste apply ing' mechanism shown-inFig. 2 and partly in section;

Fig. 4 is a-partial 44 of 3; and

Fig. 5 is a detail of one of a pair of racks Referring to the drawingsin detail, the packaging machine, with which our invention mayco-pending application above idencross section on the lineco-operate mayinclude a suitable supporting frame 10, comprising top side bars 11,comer bars together.

At the rear end of the machine is a paste box 14, preferably mounted forforward and backward adjustment on supports at each side of the machine(but one being shown) and on the opposite bottom corners of the pastebox 14, are appropriate lugs or projections 16, which rest each in apocket 1'7 formed inopposite rack bars 18, which are slidable on thesupports 15, and are operated by a cross-shaft 19, having gear parts tomesh with the rack bars 18,-

and said shaft is manually turned through a hand-wheel '21, fastthereto, for the purpose of adjustably sliding the paste-box 14,forwardly or backwardly on the frame 15, to change the tension or lengthof the horizontal pasted portion 22, of a comparatively heavy web orback-sheet 23, taken from a convenient source of supply 24 and drawnaround an idle roller 25 upwardly and over a'platen-roller 26, thenforwardly to printing, sealing and feeding devices hereafter described.7

Marginal, and spaced cross lines of paste 27 and 28, respectively, areapplied to the web 22' between intermittent feeding movements of theplaten roll 26, in the following manner and by devices which will now bedescribed:

A feed-roller 29, dips into the paste 30 in paste-box 14 and is mountedon a cross-shaft 31, having fixedon an extended end thereof, a pair ofgears 32, and loosely mounted to rotate freely on this extended end is athird gear 33, carrying a spring-pressed dog 34, in contact with y theteeth of the outer of said fixed gears. Fig. 2 apartial verticallongitudinal section.

- Constantly in mesh with the free running gear 33, is areciprocatingrack 35, operated by parts of the packaging machine.

said back-sheet 23, as it is drawn over en-roller 26.

the plat- In operation, the rack 35 when moving backand drags the dog orpawl 34 inoperatively over teeth of the outer one of the double gears32, but when the said rack starts forwardly the dog 34 picks up thedouble-gears 32, and through the said gear train, including the inner ofthe double-gears 32, central gear 38, and platen-roller gear 37, therollers 29, 39 and 26 are turned to permit a determined length of theweb 23 to be drawn around and over the platen-roll 26, the length of theshift being the longitudinal dimension of adetermined package to beformed by the machine.

Attached to suitablebrackets 41, secured to the back of the paste-box 14is a scraper-blade 42, extending longitudinally of the feed-roll 29 andin constant contact therewith, for arresting excessive paste carriedupwardly on said roll which paste excess flows back into said pan 14.

A rock-shaft 43, is journalled in bearings 44, extending upwardly fromthe rear corners of the paste-box 14, front bearings 45 on this boxserving as journals for the platen-roller 26,, as will be obvious.

The rock-shaft 43, has a gear 46 keyed thereto,

with which a gear-rack 47, secured to a crosshead 48, is meshed, andthese parts are operatively held in mesh by a suitable two-part boxcasting 49, having opposite tubular bosses 50 loosely encompassing thesaid rock-shaft for permitting the gear-rack 47 and the attachedcross-head 48 to have oscillating movements for the purpose presentlyset forth; the two-part box casting being held'together by a cross-boltor screw 51, see Fig. 2.

Fixedly supported above the ends of the pastebox, 14, are angle plates52, each having an arcuate slot 53, through which pins 54 extending fromthe ends of the cross-head 48 operate to guide and limit the movementsof the said cross-.

The unit constituted by the said second friction gear 58, the spur gear60 and the connecting hub 59, is free on the shaft extension 55, and tomaintain the said friction gears and facing in proper operative contactfor driving shaft 43, a charged spiral spring 61 is interposed betweenthe spur. gear 60 and a collar 62, pinned to said shaft extension 55.

- The transverse paste lines 28, are applied to the back-web 23 in thefollowing manner: A paste pad 63, (Fig. 2), is carried by the crosshead48, and in the back stroke of the gear rack 35, when the web is at rest,the gears 60, 58, 56 and 46 on shaft 43, and the gear for drawing thecross-head 48 backwardly, causing the pins 54 to abut the rear ends ofsaid arcuate slots 53 and support the cross-head and paste pad slightlyabove and over the axis of the feed roller 29 with the paste pad clearas at 64, to suspend the head in a manner to cause the pad 63 to bemaintained clear of the feed roller 29; but at the beginning of itsforward movement, to apply a transverse paste line on the web, saidcross-head takes a sharp drop to permit contact of the paste pad 63 withthe feed roller 29, to pick up a fresh supply of paste therefrom.

The supporting frame 15 of the paste box and its associated parts, maybe of any desired construction to permit of horizontal adjustment,through the operation of the gear or gears 20 and gear rack or racks 18.

The reciprocable gear rack may be operated by a motor 65, through anelectric circuit 66 (Fig. 1) controlled by a switch 67. The motor has ashaft 68, having a worm and gear driving connection 69 with a mastergear 70, mounted to rotate with a cross shaft 200 on the ends of whichare cranks 73 connected by crankrods 74 to opposite rock arms 75 carriedon a feeding and sealing carriage on which a cutgear rack and Just priorto the pick-up action of the pawl or dog 34, on the gear 33, foroperating the gear train32, 38, 37 torotate the paste transferringrollers 29 and 39 and to impart a web feeding rotary movement to saidplaten roll 26, thus this roll 26 performsadouble func tion, i. e. as aplaten for taking the thrust of the pasting pad when applying a crossline of paste to the web, and for feeding the web forwardly from thesupply roll 24 under slight tension produced by a suitable spring 24afastened at one end on the supporting frame; its free end havingfrictional contact with the web supply roll 24, as shown in Fig. 1 ofthe drawmgs.

What we claim is:

1. In a coating machine, the combination with a supporting frame and apower member, of a paste box; gear means for adjusting its position;rotary means for feeding a web; rotary means for applying marginal pastelines to said web; angle plates mounted above said paste box' and havingeach an arcuate slot; a'reciprocatory cross-head having pins at its'endswhich project into said slotsfor guiding and limiting the operativemovements of said cross-head; a paste applying pad carried by thecross-head and means and connections operated by said power member foroperating said rotary feeding means, the rotary, paste applying meansand the cross-head, and said pad for applying transverse paste lines tosaid web.

2. In a coating machine, the combination with a frame and a reciprocablepowered toothed rack; of a paste box; an intermittently driven platenroller journalled at its forward end; a reversible shaft mounted overthe rear of said paste box; a gear fixed on said reversible shaft;

a housing around said gear; a rack bar operatively connected with saidgear and extending horizontally through said casing; coacting frictiondisks, one loose, one fixed on said shaft; a spring for forcing thedisks into driving contact; a gear on the loose disk and engaging thepowered toothed rack; and means on the said rack bar for applying apaste line to a web resting on said platen when at rest and when saidpowered tooth rack is operated to the right, or rearwardly.

3. In a coating machine, a paste box; standard bearings at the cornersthereof; angle plates fixed to said bearings and having arcuate guideslots; a coating pad supported by said slots;

means for' operating the coating pad in the arc of said slots; rack barsunder said paste box;

and a gear rod engaging said rack bars through which the paste box maybe adjusted in position. 4. In a coating machine, the combination of aframe; an intermittently powered slidable toothed bar; a paste box; gearmeans for 'adjusting its position longitudinally; arcuate guides on saidpaste box; a rotary platen for feeding a web; rollers for applyingcontinuous marginal paste lines to said web; a cross head; a pad on theunder face thereof; pins projecting from the ends of the cross head intoengagement with said guides; and gears and connections between saidslidable toothed power bar and said cross head for moving the pad to theweb in a fixed path between the dwells of the powered tooth bar feedingoperations.

ROBERT J. HUTT. GEORGE A. HUTT.

